The nonstop flight to San Salvador, El Salvador, will start Sept. 6 and be offered three days a week. The flight to Guatemala City will begin Sept. 7. That flight will initially be offered three days a week and then increase to four days a week in November.

"The addition of San Salvador and Guatemala City to our Houston destination list will provide our guests more options to visit loved ones and experience all of what these amazing regions have to offer," Mark Kopczak, Spirit Airlines' vice president of network planning, said in the news release.

The new routes are an expansion of Spirit's existing international service departing Houston for Cancun and San Jose del Cabo, Mexico, and San Pedro Sula, Honduras.

Bush Intercontinental is known as a hub for connecting to Latin America. In March, airport officials reported six airlines providing an average of 62 daily departures to 25 destinations in Mexico. Across Latin America, Mexico and the Caribbean, officials said the airport has 8 airlines providing 88 nonstop flights per day.